Global gene expression analysis of cacao embryogenesis. (A) Representative images of zygotic and somatic embryo stages used for RNA extraction. Zygotic Embryos at stages: Torpedo, Early-Full, Late-Full, Mature. Somatic Embryos at stages Late Torpedo and Mature. (B) Global gene expression Heatmap and Cluster analysis of cacao zygotic and somatic embryo samples. Cluster analysis on Y axis represents similarities in overall gene expression profiles while cluster analysis on the X axis (above) indicates the relatedness of gene expression profiles between the different tissue samples. The log2 of relative gene expression levels are depicted in color values indicated by the color key at bottom right.